Thermostat will not allow client to lower temperature, only raise temperature. Determined faulty thermostat. Before replacing thermostat, jumped out system so cooling runs continuously and did a complete evaluation of system. Notice that there is no surge protection on the system, compressor has high startup amps, and is low on refrigerant. Gave client solutions for issues with the system. Client chose solution #1. Replaced thermostat, installed hard start kit to lower compressor startup amps, installed surge protector, and charge system with 2 pounds of refrigerant. Client signed up for annual membership. Cycled and tested system, all operations OK at this time.